Edgeless Systems Contrast 1.8.0 before 1.24.1 contains an incorrect permissions vulnerability where the node installer writes the containerd config world-writable (0666). Local unprivileged users on the node can modify the containerd config, for example overwriting the runc location, to escalate privileges.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
edgelesssys:contrast
References 2
https://github.com/edgelesssys/contrast/security/advisories/GHSA-376m-h37w-4rvq
GitHub Security Advisory (GHSA-376m-h37w-4rvq)
https://www.vulncheck.com/advisories/edgeless-systems-contrast-1.8.0-before-1.2…
VulnCheck Advisory: Edgeless Systems Contrast 1.8.0 before 1.24.1 World-Writable Containerd Config Privilege Escalation